Proof calculi;
Natural deduction;
Sequent calculus
Hilbert kalkul;
Axiomatic theories of relations; ordering and equivalence
Axiomatic theory of functions; mapping, isomorphisms and homomorphisms
Algebraic teories; groups, fields
Theory of lattices; relational vs. algebraic
Theories of arithmetic, Gödel's theorems on incompleteness
Natural deduction;
Sequent calculus
Hilbert kalkul;
Axiomatic theories of relations; ordering and equivalence
Axiomatic theory of functions; mapping, isomorphisms and homomorphisms
Algebraic teories; groups, fields
Theory of lattices; relational vs. algebraic
Theories of arithmetic, Gödel's theorems on incompleteness